Jaye,
Well, yes, that's true, I suppose. But, with all the double-tension kits out there that are ready to go, it wouldn't make sense to try and turn this unique kit into something else. The fact is that, this type of kit simply isn't practical in terms of a player's, gigging kit. No argument, there. But it IS an unmolested and fairly unusual kit as-is.
The same thing holds true for a Ludwig Octa-Plus kit. They are not really practical by today's standards. Then again, the Octa-Plus is the one kit I used to stare at in the old catalogs and dream about riffing down that string of toms. So the value, to me, with kits like this, is other than for practical purposes. I already have kits for practical use. But I also like drums that may be considered impractical by present standards. I would LOVE to have an Octa-Plus in like-new condition. I've never seen one in a drum shop -only in pictures.
And that John Gray kit would be a, let's say, "lesser" example of the same thing -something that's very rare to find intact and in excellent condition.Burger Kin